package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
//        向菜品表插入1条数据
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor ->{
                dishFlavor.setDishId(dishId);
            });
            //        向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
//        getTotal()获取分页查询总记录数, getResult()获取分页查询结果
        return new PageResult(page.getTotal(), page.getResult());
    }
//菜品批量删除
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
//        判断当前是否能删除--是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
//                说明菜品在起售中,不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
//        是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
//        删除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
////        删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
//        根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);

//       根据id集合批量删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);


    }
//      根据id查询菜品数据
    @Override
    public DishVO getByIdWithFlavor(Long id) {
//        根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
//        根据菜品id查询口味数据
        List<DishFlavor> dishflavors = dishFlavorMapper.getByDishId(id);
//        将查询到的数据封装到DishVO中并返回
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishflavors);
        return dishVO;
    }
//根据id修改菜品基本信息和口味信息
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
//        修改菜品表的基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
//        删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
//        重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor ->{
                dishFlavor.setDishId(dishDTO.getId());
            });
//            向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
//启用和禁用菜品管理
    @Transactional
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
        if (status == StatusConstant.DISABLE) {
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishIds);
            log.info("根据菜品查询到的关联套餐id有：{}", setmealIds);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }
//根据分类id查询菜品
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = new Dish().builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
}
